linux-kernel - Re: [PATCH -v2 00/33] implement atomic_fetch

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Message-ID: <20160602093304.GX3190@twins.programming.kicks-ass.net>
Date:	Thu, 2 Jun 2016 11:33:04 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Vineet Gupta <Vineet.Gupta1@...opsys.com>
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Subject: Re: [PATCH -v2 00/33] implement atomic_fetch_$op

On Thu, Jun 02, 2016 at 09:27:36AM +0000, Vineet Gupta wrote:
> On Tuesday 31 May 2016 03:59 PM, Peter Zijlstra wrote:
> > Notes:
> >  - arc asm/atomic.h is a bit of a mess after the eznps merge, I would
> >    recommend a restructure or split of that file, but could not find
> >    the will to do it.
> >  - arc, metag and tile could convert to _relaxed.
> 
> Yes that was bothering me too. The split is indeed in order. However good news is
> even w/o it I have decent cleanup as all the backoff retry code can now be
> removed. The hardware guys did their foo and production RTL with latest h/w
> release doesn't suffer from the scond livelock problem. I'd disabled the config
> option for some time and now the code can be removed as well.
> 
> What's ur merge plan - are u going to rebase/respin once more so I can push those
> updates to Linus for 4.7-rc2. Or you could carry those ARC patches in ur tree -
> ahead of ur series. I'd much rather prefer the revert / cleanup before adding new
> code which extends the back off code only to be deleted later.

I was hoping to get these into tip for v4.8, I can rebase on whatever
changes you make in v4.7 no problem.